Combination jolt-ramming and rock-over machine.



W. C. NORCROSS.

COMBINATION IOLT-RAMMING AND ROCK-OVER MACHINE.

APPLICATION FILED DEC-2l, I9I6.

1 ,245,955. Patented Nov. 6, 1917.

3EISSHEET I.

. W. C. NORCROSS. COMBINATION JOLT-RAMMING AND ROCK-OV-ER MACHINE.

APPLlcATloN mw Diem. 191s.

1,245,955. Patented N0v.6,`1917.

3 SHEETS-SHEET 2.

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wILLIAI/I` c. Noncnossjor TERRE HAUTE, INDIANA'.

- COMBINATION JOLIE-aanname 'AND noc'II-ovEn'IfIAcIIINE.

To aZZ whom t may concern:

\ Be it known that-I, WILLIAM C. Noncnoss,

a citizen Vof.' the United States,`residing at Terre Haute, county ofVigo, andState of Indiana, have invented certain new and usefulImprovements in Combination Jolt-Ramming and Rock-Over Machines,of'which the following is a specii'ication. l s" This inventionrelatestocombination joltramming and rock-over machines:

- AMachines of the general 'class to which myV invention belongs embodyan automatic jolt! ramming machine, ay supplementaltable to supp'ort'theflask yandfmold, and means for swinging or *rocking the supplementaltable over, after themold has been rammed, t0 bring it. toan'inverted'position, so that the mold may be drawn vor loweredj awaylfrom the pattern. Machines of this. general char-` acterare exemplifiedin the constructionfsetl fortzh in my Patent No. 1224407 dated May l,191

.My object is to provide in the present invention novel means forrocking the supplemental table over into linverted position, whichembodies a construction of extreme simplicity, great strength anddurability, positiveness of action and adaptability to accomplishrocking-over of the'table, in an automatic manner, by elevation anddepression of the piston of the jolt-rammingmachine, under the controlof a suitable valve; Furthermore, the lnovel rock-over mechanism setforth hereinafter is adapted for use in connection with amovable drawingtable or with a stationary t'ablefthe rock -over mechanism servingeitherpurpose, according to the type of drawing table employed.

The: present improvements embody novel lever mechanism ofa minimumnumber of parts, cooperatively related tothe supplemental rock-overtable in such manner that the foregoing operations may be carried outwith either a stationary or.l a movable drawing table. f

Another object of the invention is the provision of a drawing tablehaving adjustable flask or mold .supports whereby a shorter drawingcylinder may be employed and the effective movement of the tableminimized when drawing a very shallow flask.

If desired avcushioning device such as a spring or an oil cushionmechanism may be used in connection with the rock-over mechanism toeliminate or substantially minimize the jerk, if any, of the rock-overtable assit approaches vertical position, Fulthrmore,

` 1 vspenieation of Lettersracent.'

I may 4use a `,spring mechanism which lwill not only accomplish theforegoingfunction but will assist inreturning., the rock-over table tonormal position after the moldhas In the accompanying drawings, y l 'lFigure l is a side elevation, partlyin section, thefparts-being shown infull .linesin normalv l'position and the` lever mechanism straightenedfout and` locked in. dotted lines to illustrate theelevation of themoldto first position prior to drop of the piston; j Fig.` 2 .isasimilarjview villustrating by dotted lines'the second step wherethe'piston has lowered to swing thefsupplemental table and the mold intovertical position, full lines representing the third,.or rock-over,position, they piston beingthen elevated; Y Fig. 3v a sideelevationvshowing the fourth position wherein 7 the lever mechanism is unlockedyso that the ,piston maybe again loweredto permit .the mold to "belowered onto a stationary leveling table; y

Fig. 4 a detailview of the improved drawing table of Figs; l and 2;' andFig. 5 a detail view showing a cushion spring to prevent; shearing ofi'of the-pivots. "While Ithe present improvements are shown and describedin connection with certain features of thejolt-ramming machine of myPatents,"1,1`94,059, `August 8, 1916,'

I `lljfatented Nov. 6, 1917.l Application led December 21,1916,Sera1N0.138,204

The machine has a base `1 vwhich supports cylinder 2, having a valvecontrolled inlet pipe 3 and a valve controlled exhaust pipe t. In thecylinder a piston 5, which carries the main table 6 andthe supplementalor rock- Qver table 17, which is hinged `thereto yat @7 Y To admit themotive fluid presure to the bottom of the cylinder 2 beneath the lowerlend of the piston 5, there is provided a pipe 9, having a three-wayvalve 10. rllhe valve 10 remainsclosed during the ramming of the mold,the valves of the pipes 3 and l then being open. When the moldhas beenrammed, the valves in the pipes 3 and t are closed, so that the pistonis then subject to pressure entering through the pipe 9 or eX- haustingthrough said pipe, according to the manipulation of the valve 10. By1nanipulating the valve 10, the operator can elevate the piston 5 orlower it as desired, to thereby bring about the different positions ofthe llever mechanism andthe supplemental and main tables, to causerockingover of the mold and the returnof the supplemental table. i

The piston head may be guided by bolts 11 and the it between the pistonhead `and the tablej 6 may bola driving tit. The valve mechanism, notshown, may be that disclosed in my patents aforesaid. A stop bolt 11Llimits the upward I'novement of ythe table 6. Y n

The supplemental or rock-over table 7 has a lug12V provided with anadjustable stop screw or bolt 13 adapted to bear against the table 6when the table 7 is in inverted position, as shown in Figs. .2 and 3 by4full lines, to thereby form an abutment fory the supplemental table."

One or two of the rock-over mechanisms now described may be employed,but only one need ,be used. Pivoted at 14 is the lower link 15 of alever mechanism y,whose upper link 16 is of bell crank'fform, the ,twolinks being pivoted `together at 17 "and one 'of them having a stop orlug 18 to engage the other of them wheny they are in alined condition sothat they are in position to besecured together by any suitable lockingdevice 19, which can be manipulated by hand, such as a bolt on link 15adapted to venter a hole (Figs. 1, 3, 5) in link 16. `,'llhe `upper endof the bell cranklink16 is vpivoted at 2O vtothe supplemental table 7.Normally, during'thev reciprocations of the piston 5 when the'mold isbeing rammed, the ylever mechanism turns on the pivots 14, 17 120, andthe table 7 4rests on the table 6. The parts are then in the positionshown by full lines in Fig'. 1. "After the mold has been rammed, thevalves in thepipes 3 and fl are closed and the'rocking over of the table7 with the flask,

mold, and pattern carried thereby, is accomplishedby `manipulation ofthe three-way valve 10. Air is let into the bottom of the cylinder 2until the tables and parts -assume the positions'shown by dotted linesinFig. 1. Table 7 `is then on the ,table 6 and the links 15, 16 havestraightened out into alineme'nt andare locked by thetlocking de.-

`but this raction.causes the table 7 vice 19, so that the lever 15, 16,is rigid throughout, and will thereafter rock on its pivot 14v aloneuntil the lock 19 is released. rhe operator next turns the valve 10 toeX- haust Vthe pressure beneath the piston 5, whereupon the piston andthe table 6 lower to be rocked by the lever 15, 16, to the verticaldotted line position of Fig. 2, the table 6 being then in the lowereddotted lineiposition. rllhe operatorvagainA turns the valye 10 to admitpressure beneath the piston V5, whereupon the latter again ,rises andassumes the full line nposition of Fig. 2, but as the table 7 is pivoted,at 8 tothe table 6, the table 7 is rocked overto the invertedjull line,position of Fig. 2. The stop 13 .now `abuts the table 6. The .moldisthen readytobe drawn from the .,pattern, the latterreinainingconnected to. the table 7. A.k reversal 7of the foregoing operationswill rock the table 7 back to the raised dotted iline position of Fig.v1. The lock 19must thenbe `.released so that the links 15, 16, can turnon .the pivot 17, whereupon the table 7 may Ybe lowered, with table 6,vto the :full line position of Fig. 1.

Assuming that the table is inthe rockedover .or inverted position shownby full llines in Fig. 2, the lock 19 then holds the links 15, 16, rigidwith each other. 1f the-lock 19 be released when the lever is in thisposition, the piston 5 vmay be lowered by exhausting the pressurethrough the valve 10, `the links 15, 16 then bending on the pivot 17.The table 7 in its inverted position will then lower, together with thetable `6 and piston 5. This construction enables a statibnary drawingtable or mold support 21, Fig. 8, to be used. Such a table should Ahavesome leveling means so that it will adapt itself to the lbottom board orbattens of the moldflask 22. adaptability of the lever mechanism 15, 16,is that the necessity of employing a raising and lowering drawing tablewith a cylinder and piston is obviated. 1n the operation shown in Fig.3,once the flask 22 has become supported bythe stationary table 21,vsurmounting column 21, and the flask and mold have been released by handfrom the table 7 they remain on the stationary table 21, the pressurecan be admitted into the bot-k tom of cylinder 2, thereby elevating thetable 6 and with it the table 7, resulting in straightening out of thelinks 15, 16, until they come into line and are locked as shown in fulllines in Fig. 2. Return of the inverted table 7 to normal position, ,inthe manner heretofore described, may then be had. f

The operation just described is not necessary'when a drawing table whichraises and lowers in Figs. 1, 2 lis employed.

1n Figs. 1, 2 and 4C, there is `shbvvn a draw- The particular advantageof this ing cylinder 28 having a piston, not shown, which supports atable 24. The table illustrated is that shown in my'application SerialNo. 126,845, with improvements applied, consisting of mold supports 25adapted to be' raised and lowered, and held where adjusted. 'Ihesesupports are located at the end portions of the sections 26 of the table24, and are carried by stems 27 which are adjustable vertically in thesplit ends 28, and are held'by bolts 29, which clamp the split endsagainst said stems 27. The supports 25 can be raised to any desiredheight to approximate the position of the bottom board of the mold flask22, so that the play of the piston in the cylinder 23 and the extent ofelevation of the table 24 need be only very short to accommodate thesupports tothe depth of the flask. The sections 26 are selfleveling, asthey bear upon the ball end 30 of the piston and are articulated by bolt31, as in my aforesaid application.

An oil cushion such as set forth and described in my Patent No. 1224407,may be applied to the lever 15 to cushion the jerk, if any, as the tableapproaches vertical position, but I do not limit myself to the use ofthis device.

As shown in Fig. 5, I may use a balancingl spring 32 coperating with thelink 16, to accomplish the same purpose and to assist in returning thetable 7 to its normal position on its return from inverted position.

There may also be employed, if desired, a cushion, or shock-absorbing,spring 83 supported by base 1 at 34 and having its upper end providedwith a head 35 on which lever 15 rests. This serves to prevent shearingaction on the pivots 14, 17 20, particularly 14 and 17, when the piston5 is reciprocating during the ramming of the mold.

The table 6 may be dispensed with and the table 7 directly hinged to thehead or end of piston 5. I do not, therefore, limit myself to the use oftable 6. The effect of hinging table 7 to table 6 is the same as hingingtable 7 directly to piston 5.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A combination jolt-ramming and rockover machine comprising a pistonand cylinder, valve controlled means for admitting and exhausting motivefluid pressure thereto to elevate and lower the piston, a rock-overtable carried by the piston, and means cooperating with the rock-overtable adapted to cause rocking-over of said table by three or moresuccessively different and alternately opposite movements of saidpiston.

2. A combination jolt-ramming and rock- Copies of this patent may beobtained for ve cents each, by addressing the "Commissioner of Patents,

over machine comprising a piston and cylinder, valve controlled meansfor admitting Y and exhausting motive fluid pressure thereto to elevateand lower the piston, a rock-over table carried by the piston, anarticulated lever mechanism coperating with the rockover table, andmeans for releasably locking the parts of said lever mechanism Sothatthey may be rigid, or movable, in relation to each other, said levermechanism being vadapted to cause rocking-over of the table.

3. In a mechanical movement, the combination. with a movable carrier, ofa rockvover table carried thereby, and an articulated lever comprisinglinks directly jointed together, one -part having la pivotal connectionwith saidtable distinct from the pivot ofthe latter, the other parthaving a Xed pivot, said lever being adapted to cause the table to rockover when the carrier is moved.

yarticulated lever having one of its parts pivoted to one of said tablesand another ofv its parts pivotally mounted, and a releasable lockingdevice whereby the parts of the articulated lever may be securedtogether in rigid relationship to effect swinging of the table to whichthe lever is pivoted.

6. In a mechanical movement, the combination with a movable carrier, ofa rockover table carried thereby, and means c0- operating with therock-over table adapted to cause rocking-over of said table by three ormore successively different and alternately opposite movements of saidmovable carrier.

7. A combination jolt-ramming and rockover machine comprising a pistonand cylinder, valve controlled means for admitting and exhausting motivefluid pressure thereto to elevate and lower the piston, a rock-overtable carried by the piston, a sectional. lever mechanism coperatingwith the rock-over table, and means for releasably locking the sectionsof said lever mechanism so that they may be rigid, or movable, inrelation to each other, said lever mechanism being adapted to causerocking over of the table.

In testimony whereof, I hereunto affix my signature.

WILLIAM C. NORCROSS Washington, D. C.

